//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//---------------------------------------------------------------------------//

#ifndef CRYPTO3_RIJNDAEL_POLICY_HPP
#define CRYPTO3_RIJNDAEL_POLICY_HPP

#include <nil/crypto3/block/detail/rijndael/rijndael_functions.hpp>

namespace nil {
    namespace crypto3 {
        namespace block {
            namespace detail {
                template<std::size_t KeyBits, std::size_t BlockBits>
                struct basic_rijndael_policy : rijndael_functions<32, BlockBits> {
                    constexpr static const std::size_t byte_bits = rijndael_functions<32, BlockBits>::byte_bits;
                    typedef typename rijndael_functions<32, BlockBits>::byte_type byte_type;

                    constexpr static const std::size_t word_bits = rijndael_functions<32, BlockBits>::word_bits;
                    constexpr static const std::size_t word_bytes = rijndael_functions<32, BlockBits>::word_bytes;
                    typedef typename rijndael_functions<32, BlockBits>::word_type word_type;

                    constexpr static const std::size_t block_bits = BlockBits;
                    constexpr static const std::size_t block_bytes = BlockBits / byte_bits;
                    constexpr static const std::size_t block_words = block_bits / word_bits;
                    typedef std::array<byte_type, block_bytes> block_type;

                    constexpr static const std::size_t key_bits = KeyBits;
                    constexpr static const std::size_t key_words = key_bits / word_bits;
                    constexpr static const std::size_t key_bytes = word_bytes * key_words;
                    typedef std::array<byte_type, key_bytes> key_type;

                    constexpr static const std::size_t round_constants_size = 30;
                    typedef std::array<byte_type, round_constants_size> round_constants_type;

                    BOOST_ALIGNMENT(64) constexpr static const round_constants_type round_constants = {
                        0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
                        0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91};

                    constexpr static const std::size_t shift_offsets_size = 3;
                    typedef std::array<byte_type, shift_offsets_size> shift_offsets_type;

                    constexpr static const shift_offsets_type shift_offsets = {1, block_words == 8 ? 3 : 2,
                                                                               block_words > 6 ? 4 : 3};

                    constexpr static const shift_offsets_type inverted_shift_offsets = {
                        block_words - 1, block_words == 8 ? 5 : block_words - 2,
                        block_words == 8 ? 4 : block_words == 7 ? 3 : block_words - 3};

                    constexpr static const std::size_t mm_size = 16;
                    typedef std::array<byte_type, mm_size> mm_type;

                    constexpr static const mm_type mm = {0x02, 0x03, 0x01, 0x01, 0x01, 0x02, 0x03, 0x01,
                                                         0x01, 0x01, 0x02, 0x03, 0x03, 0x01, 0x01, 0x02};

                    constexpr static const mm_type inverted_mm = {0x0e, 0x0b, 0x0d, 0x09, 0x09, 0x0e, 0x0b, 0x0d,
                                                                  0x0d, 0x09, 0x0e, 0x0b, 0x0b, 0x0d, 0x09, 0x0e};

                    constexpr static const std::size_t constants_size =
                        rijndael_functions<32, block_bits>::constants_size;
                    typedef typename rijndael_functions<32, block_bits>::constants_type constants_type;
                    typedef typename rijndael_functions<32, block_bits>::prefetched_constants_type
                        prefetched_constants_type;

                    BOOST_ALIGNMENT(64) constexpr static const constants_type constants = {
                        0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
                        0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
                        0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
                        0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
                        0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
                        0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
                        0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
                        0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
                        0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
                        0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
                        0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
                        0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
                        0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
                        0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
                        0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
                        0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16};

                    BOOST_ALIGNMENT(64) constexpr static constants_type const inverted_constants = {
                        0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
                        0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
                        0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
                        0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
                        0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
                        0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
                        0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
                        0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
                        0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
                        0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
                        0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
                        0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
                        0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
                        0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
                        0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
                        0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d};
                };

                template<std::size_t KeyBits, std::size_t BlockBits>
                BOOST_ALIGNMENT(64) constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::round_constants_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::round_constants;

                template<std::size_t KeyBits, std::size_t BlockBits>
                BOOST_ALIGNMENT(64) constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::constants_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::constants;

                template<std::size_t KeyBits, std::size_t BlockBits>
                BOOST_ALIGNMENT(64) constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::constants_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::inverted_constants;

                template<std::size_t KeyBits, std::size_t BlockBits>
                constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::shift_offsets_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::shift_offsets;

                template<std::size_t KeyBits, std::size_t BlockBits>
                constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::shift_offsets_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::inverted_shift_offsets;

                template<std::size_t KeyBits, std::size_t BlockBits>
                constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::mm_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::mm;

                template<std::size_t KeyBits, std::size_t BlockBits>
                constexpr typename basic_rijndael_policy<KeyBits, BlockBits>::mm_type const
                    basic_rijndael_policy<KeyBits, BlockBits>::inverted_mm;

                template<std::size_t KeyBits, std::size_t BlockBits>
                struct rijndael_policy : public basic_rijndael_policy<KeyBits, BlockBits> {
                    constexpr static const std::size_t word_bits = basic_rijndael_policy<KeyBits, BlockBits>::word_bits;
                    constexpr static const std::size_t word_bytes =
                        basic_rijndael_policy<KeyBits, BlockBits>::word_bytes;
                    typedef typename basic_rijndael_policy<KeyBits, BlockBits>::word_type word_type;

                    constexpr static const std::size_t block_bits =
                        basic_rijndael_policy<KeyBits, BlockBits>::block_bits;
                    constexpr static const std::size_t block_words =
                        basic_rijndael_policy<KeyBits, BlockBits>::block_words;

                    constexpr static const std::size_t key_bits = basic_rijndael_policy<KeyBits, BlockBits>::key_bits;
                    constexpr static const std::size_t key_words = basic_rijndael_policy<KeyBits, BlockBits>::key_words;

                    constexpr static const std::uint8_t rounds =
                        (key_words > block_words ? key_words : block_words) + 6;
                    constexpr static const std::size_t key_schedule_words =
                        basic_rijndael_policy<KeyBits, BlockBits>::block_words * (rounds + 1);
                    constexpr static const std::size_t key_schedule_bytes = key_schedule_words * word_bytes;

                    typedef
                        typename ::nil::crypto3::detail::basic_functions<word_bits>::word_type key_schedule_word_type;
                    typedef std::array<key_schedule_word_type, key_schedule_words> key_schedule_type;
                };

                template<std::size_t KeyBits>
                using aes_policy = rijndael_policy<KeyBits, 128>;
            }    // namespace detail
        }        // namespace block
    }            // namespace crypto3
}    // namespace nil

#endif    // CRYPTO3_RIJNDAEL_POLICY_HPP
